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8PSK_star

于 2020-11-22 发布 文件大小:4KB
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下载积分: 1 下载次数: 17

代码说明:

  8psk 数字解调器的simulink仿真(8psk digital modem s simulink)

文件列表:

8PSK_star
.........\ch7example15_star.mdl,16590,2007-09-01

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  • OFDM
    OFDM调制解调系统的设计,内涵matlab simulink的模型和误码率监测的M文件,改OFDM调制解调系统模型可以适应于matlab较低版本,可执行。(OFDM modulation and demodulation system design, the connotation Matlab Simulink model M-file and bit error rate monitoring, change the OFDM modulation and demodulation system model can be adapted to a lower version of the executable in matlab. )
    2012-05-10 11:34:52下载
    积分:1
  • QC_codes
    准循环ldpc编码在matlab上的实现(Quasi-cyclic ldpc coding in matlab on the realization of)
    2012-11-26 10:43:15下载
    积分:1
  • OFDM_Channel-estimation
    OFDM(正交频率调制)实现多载波调制基本思想是将带宽信道分解成许多并行的窄子信道,是每个子信道的想干带宽,从而实现平稳衰落。搭建了完整的OFDM信道链路系统,运用三种不同的信道估计方法(LS信道估计、DFT信道估计、Improved-DFT信道估计),并对AWGN理想信道和衰落信道误码情况进行了仿真和比较。(OFDM (Orthogonal Frequency Modulation) multicarrier modulation basic idea bandwidth channel is decomposed into a number of parallel narrow subchannels, each subchannel wanted bandwidth, in order to achieve a smooth fading. Build a complete OFDM channel link system, the use of three kinds of different channel estimated method (LS channel estimated, to the DFT letter Tao estimates, Improved-the DFT letter Road estimated), and AWGN ideal letter Road and fading channel bit error situation conducted a simulation and comparison .)
    2012-10-17 10:56:16下载
    积分:1
  • 5
    说明:  OFDM系统仿真 ----比较OFDM系统的IDFT/DFT实现与模拟调制实现仿真代码,其中假设OFDM系统包含8个子载波,fc=1 Hz,子载波频率间隔为1 Hz,每个子载波采用4-QAM调制,符号周期为1秒(OFDM IDFT/DFT 4-QAM FFT/IFFT)
    2018-05-09 23:07:55下载
    积分:1
  • IIR 数字滤波器的设计与实现
    说明:  设计一个巴特沃兹数字低通滤波器,其技术指标为:3dB带宽为0.2π,阻带截止频率为0.3π,通带纹波为1dB,阻带衰减大于30dB,采样间隔T=10ms。 1)采用冲激响应不变法; 2)采用双线性变换法设计; 3)采用FIR的窗函数(Hanning窗、Hamming窗或Blackman窗)设计。(A Butterworth digital low-pass filter is designed. Its technical specifications are: 3 dB bandwidth is 0.2 pi, stopband cut-off frequency is 0.3 pi, passband ripple is 1 dB, stopband attenuation is more than 30 dB, sampling interval T=10 Ms. 1) Impulse response invariance method is adopted. 2) Design by bilinear transformation method; 3) FIR window function (Hanning window, Hamming window or Blackman window) is used to design.)
    2019-04-19 10:03:16下载
    积分:1
  • 一种基于高阶累积量的数字调相信号识别方法
    对当前通信信号中常用的数字调相信号BPSK、QPSK、1/4一QPSK、8PSK的调制识别问题,提出了一种基于信号差分高阶累积量的识剐算法。该算法分两个层次进行调制识别,首先利用信号的四阶累积量特征对BPSK、QPSK和{1/4一QPSK、8PSK}信号进行识别,然后再利用信号差分的四阶和八阶累积量特征对1/4-QPSK、8PSK信号进行识别。从理论上分析了的该算法的有效性,并通过计算机仿真验证了算法具有良好的性能。(A recognition algorithm based on differential high-order cumulant is proposed for the modulation recognition problems of BPSK, QPSK, 1/4-QPSK and 8PSK, which are commonly used in current communication signals. The algorithm is divided into two levels for modulation recognition. Firstly, BPSK, QPSK and {1/4-QPSK, 8PSK} signals are identified by using the fourth-order cumulant characteristics of signals, and then 1/4-QPSK and 8PSK signals are identified by using the fourth-order cumulant and eighth-order cumulant characteristics of signal difference. The validity of the algorithm is analyzed theoretically, and the good performance of the algorithm is verified by computer simulation.)
    2020-06-21 09:40:02下载
    积分:1
  • modulation
    有关4QAM,16QAM,64QAM,DQPSK的调制解调的(The 4QAM, 16QAM, 64QAM, DQPSK modulation and Demodulation)
    2020-10-19 19:07:25下载
    积分:1
  • 代码
    说明:  信号处理、检测。CHAP全称是PPP(点对点协议)询问握手认证协议 (Challenge Handshake Authentication Protocol)。(Noise, signal processing, detection, waveform. The full name of CHAP is PPP (Point-to-Point Protocol) Challenge Handshake Authentication Protocol.)
    2020-06-18 20:20:02下载
    积分:1
  • 05441004
    Multiple input multiple output techniques combined with orthogonal frequency division multiplexing (MIMO-OFDM) provide a promising approach for wireless systems. However, a serious drawback of the OFDM system is the high peak-toaverage power ratio (PAPR), which may severely affect the power efficiency of RF power amplifiers. In this paper, we propose a simple method to reduce the PAPR of MIMO-OFDM signals based on the use of unused subcarriers. Instead of processing the signals at each transmitter separately, a peak cancelling signal is generated at one antenna and is then applied to all the others with only simple modifications. Simulation has shown that a minimum 2 dB reduction in PAPR can be achieved for all transmit signals using this approach. As the signal processing is nearly all done at a single transmitter, repetition of the operations at each transmitter is avoided, and therefore the overall cost of the system can be significantly reduced.
    2011-11-05 01:46:42下载
    积分:1
  • turbo_logmap
    turbo码的译码,以及包含LOGMAP和SOVA两种算法(turbo code decoding, and includes two algorithms LOGMAP and SOVA)
    2008-05-15 19:18:40下载
    积分:1
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